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https://www.readbyqxmd.com/read/28427685/fe3o4-hydroxyapatite-graphene-quantum-dots-as-a-novel-nano-sorbent-for-preconcentration-of-copper-residue-in-thai-food-ingredients-optimization-of-ultrasound-assisted-magnetic-solid-phase-extraction
#1
Phitchan Sricharoen, Nunticha Limchoowong, Yonrapach Areerob, Prawit Nuengmatcha, Suchila Techawongstien, Saksit Chanthai
Fe3O4/hydroxyapatite/graphene quantum dots (Fe3O4/HAP/GQDs) nanocomposite was synthesized and used as a novel magnetic adsorbent. This nanocomposite was characterized using scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, energy dispersive X-ray spectroscopy, and magnetization property. The Fe3O4/HAP/GQDs was applied to pre-concentrate copper residues in Thai food ingredients (so-called "Tom Yum Kung") prior to determination by inductively coupled plasma-atomic emission spectrometry...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28427632/ultrasonic-treatment-of-cofe2o4-b2o3-sio2-as-a-new-hybrid-magnetic-composite-nanostructure-and-catalytic-application-in-the-synthesis-of-dihydroquinazolinones
#2
Ali Maleki, Morteza Aghaei, Hamid Reza Hafizi-Atabak, Mohammad Ferdowsi
New hybrid magnetic composite nanostructure are prepared via ultrasonic treatment by glass-ceramic method, characterized by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), energy-dispersive X-ray (EDX), element distribution image (EDX mapping), thermal gravimetric analysis (TGA)/differential thermal analysis (DTA) and N2 adsorption-desorption by Brunauer-Emmett-Teller (BET) analyses. Then, the catalytic activity of the prepared CoFe2O4@B2O3-SiO2 nanoparticles was tested in the synthesis of 2-substituted-3-(phenylamino)-dihydroquinazolin-4(1H)-ones in deep eutectic solvent (DES) based on choline chloride as an eco-friendly and recyclable media...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28426988/solar-photocatalytic-application-of-nbo2oh-as-alternative-photocatalyst-for-water-treatment
#3
Luana Márcia Bezerra Batista, Alexsandro Jhones Dos Santos, Djalma Ribeiro da Silva, Ana Paula de Melo Alves, Sergi Garcia-Segura, Carlos Alberto Martínez-Huitle
Water recycling and industrial effluents remediation are a hot topic of research to reduce the environmental impact of the human activity. Persistent organic pollutants are highly recalcitrant compounds with hazardous effects associated to their fate in water bodies. Several novel technologies have been developed during the last decades to deal with this novel contamination. However, the natural sources and idiosyncrasy of each country lead to the potential application of different technologies. In this context, we have focused on the development of phocotalytic treatment of solutions containing dyes using a novel photocatalytic material, the NbO2OH...
April 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28411227/fate-and-persistence-of-a-pathogenic-ndm-1-positive-escherichia-coli-strain-in-anaerobic-and-aerobic-sludge-microcosms
#4
David Mantilla-Calderon, Pei-Ying Hong
The presence of emerging biological pollutants in treated wastewater effluents has gained attention due to increased interest in water reuse. To evaluate the effectiveness of the removal of such contaminants by the conventional wastewater treatment process, the fate and decay kinetics of NDM-1-positive Escherichia coli strain PI7 and its plasmid-encoded antibiotic resistance genes (ARGs) were assessed in microcosms of anaerobic and aerobic sludge. Results showed that E. coli PI7 decayed at a significantly slower rate under anaerobic conditions...
April 14, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28410521/micropollutants-in-source-separated-wastewater-streams-and-recovered-resources-of-source-separated-sanitation
#5
A Butkovskyi, L Hernandez Leal, G Zeeman, H H M Rijnaarts
The quality of anaerobic sludge and struvite from black water treatment system, aerobic sludge from grey water treatment system and effluents of both systems was assessed for organic micropollutant content in order to ensure safety when reusing these products. Use of anaerobic black water sludge and struvite as soil amendments is recommended based on the low micropollutant content. Aerobic grey water sludge is recommended for disposal, because of the relatively high micropollutant concentrations, exceeding those in sewage sludge...
April 11, 2017: Environmental Research
https://www.readbyqxmd.com/read/28406630/dual-functional-ultrafiltration-membrane-for-simultaneous-removal-of-multiple-pollutants-with-high-performance
#6
Shunlong Pan, Jiansheng Li, Owen Noonan, Xiaofeng Fang, Gaojie Wan, Chengzhong Yu, Lianjun Wang
Simultaneous removal of multiple pollutants from aqueous solution with less energy consumption is crucial in water purification. Here, a novel concept of dual-functional ultrafiltration (DFUF) membrane is demonstrated by entrapment of nano-structured adsorbents into the finger-like pores of ultrafiltration (UF) membrane rather than in the membrane matrix in previous reports of blend membranes, resulting in an exceptionally high active content and simultaneous removal of multiple pollutants from water due to the dual functions of rejection and adsorption...
April 13, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28406544/halogen-free-synthesis-of-carbamates-from-co2-and-amines-using-titanium-alkoxides
#7
Jun-Chul Choi, Hao-Yu Yuan, Norihisa Fukaya, Syun-Ya Onozawa, Qiao Zhang, Seong Jib Choi, Hiroyuki Yasuda
The direct synthesis of carbamates from amines and carbon dioxide in the presence of Ti(OR)4 (R = nBu (1), Me (2), Et (3), nPr (4)) was investigated. Aniline was reacted with the titanium n-butoxide (1) in the presence of carbon dioxide (5 MPa) to give the corresponding n-butyl N-phenylcarbamate (BPC) in nearly quantitative yield (99%) within 20 min. Furthermore, 1 could be regenerated upon reaction with n-butanol during water removal. The recovered 1 could then be reused in a subsequent reaction.
April 12, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28402897/green-synthesis-of-a-magnetic-hybrid-adsorbent-cofe2o4-nom-removal-of-chromium-from-industrial-effluent-and-evaluation-of-the-catalytic-potential-of-recovered-chromium-ions
#8
Daiane R S Cruz, Bruna T J Santos, Graziele C Cunha, Luciane P C Romão
This work describes the removal of chromium ions from industrial effluent using a hybrid magnetic adsorbent, CoFe2O4/NOM, synthesized using water rich in natural organic matter. The hybrid obtained at ambient temperature (HbAmb) was calcined at 200, 400, and 800°C for 2h, and formation of the cobalt ferrite phase was confirmed by XRD, which indicated the presence of NOM in the structure of the material. Removal tests showed that HbAmb provided efficient removal of chromium at the natural pH of the effluent, while the other materials were effective at pH 6...
March 31, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28401386/a-comprehensive-review-on-removal-of-arsenic-using-activated-carbon-prepared-from-easily-available-waste-materials
#9
Monoj Kumar Mondal, Ravi Garg
Arsenic contamination in water bodies is a serious problem and causes various health problems due to which US Environment Protection Agency (USEPA) set its maximum permissible limit of 10 ppb. The present review article starts with the removal of toxic arsenic using adsorbents prepared from easily available waste materials. Adsorbent either commercial or low-cost adsorbent can be used for arsenic removal but recent research was focused on the low-cost adsorbent. Preparation and activation of various adsorbents were discussed...
April 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28397501/layer-by-layer-assembled-laccase-enzyme-on-stimuli-responsive-membranes-for-chloro-organics-degradation
#10
Rupam Sarma, Md Saiful Islam, Anne-Frances Miller, Dibakar Bhattacharyya
Functionalized membranes provide versatile platforms for the incorporation of biocatalysts and nanostructured materials for efficient and benign environmental remediation. The existing techniques for remediating chloro-organics in water consist of both physical and chemical means mostly using metal oxide-based catalysts, despite associated environmental concerns. To offer bioinspired remediation as an alternative, we herein demonstrate a layer-by-layer approach to immobilize laccase enzyme onto pH-responsive functionalized membranes for the degradation of chloro-organics in water...
April 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28397116/extended-use-of-grey-water-for-irrigating-home-gardens-in-an-arid-environment
#11
Abdulrahim M Al-Ismaili, Mushtaque Ahmed, Ahmed Al-Busaidi, Seif Al-Adawi, Roman Tandlich, Mohammed Al-Amri
The use of treated grey water (GW) for home gardens, peri-urban agriculture and landscaping is becoming popular in many water stressed countries such as Oman. This study aims to investigate the treatment efficacy, health and chemical concerns, cost-benefits and maintenance protocol of a GW treatment system as well as the effect of irrigation with GW on crop yield. Therefore, a decentralized homemade GW treatment system was installed in a newly constructed house in Muscat, Oman and studied over a 2-year period...
April 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28387441/simple-and-effective-catalyst-separation-by-novel-co2-induced-switchable-organocatalysts
#12
Julia Großeheilmann, Udo Kragl
CO2-induced switchable tertiary amine-based organocatalysts were investigated for an efficient catalyst and product separation by its different partitioning between an organic and carbonated water phase. In this case study, the switching ability of 8 tertiary amine-based catalysts between the organic and water phase by addition or removal of CO2 was investigated. Here, the catalyst switched both nearly completely (99.9%) into the aqueous phase by addition of CO2 and effectively back into the organic phase (99...
April 7, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28386151/water-use-and-treatment-in-container-grown-specialty-crop-production-a-review
#13
John C Majsztrik, R Thomas Fernandez, Paul R Fisher, Daniel R Hitchcock, John Lea-Cox, James S Owen, Lorence R Oki, Sarah A White
While governments and individuals strive to maintain the availability of high-quality water resources, many factors can "change the landscape" of water availability and quality, including drought, climate change, saltwater intrusion, aquifer depletion, population increases, and policy changes. Specialty crop producers, including nursery and greenhouse container operations, rely heavily on available high-quality water from surface and groundwater sources for crop production. Ideally, these growers should focus on increasing water application efficiency through proper construction and maintenance of irrigation systems, and timing of irrigation to minimize water and sediment runoff, which serve as the transport mechanism for agrichemical inputs and pathogens...
2017: Water, Air, and Soil Pollution
https://www.readbyqxmd.com/read/28384554/novel-polyacrylamide-based-solid-scale-inhibitor
#14
Ahmed A Younes, Heba H El-Maghrabi, Hager R Ali
Novel solid-state phosphorus-containing polymer was synthesized, characterized and investigated as anti-scaling agent for the removal of alkaline earth metals ions from water. An optimization protocol for the sorption process of the metal ions on the polymer surface was proposed and executed. The protocol involved parameters such as pH, contact time, polymer dose, and the initial concentration of the metal ion. The optimum pH was found to be around seven for all of the tested metal ions. The maximum sorption capacities of the prepared polymer were 667, 794, 769 and 709 (mg/g) for Mg, Ca, Sr and Ba ions, respectively...
March 29, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28377928/quantitative-pcr-and-digital-pcr-for-detection-of-ascaris-lumbricoides-eggs-in-reclaimed-water
#15
Lucrecia Acosta Soto, Ana Belén Santísima-Trinidad, Fernando Jorge Bornay-Llinares, Marcos Martín González, José Antonio Pascual Valero, Margarita Ros Muñoz
The reuse of reclaimed water from wastewater depuration is a widespread and necessary practice in many areas around the world and must be accompanied by adequate and continuous quality control. Ascaris lumbricoides is one of the soil-transmitted helminths (STH) with risk for humans due to its high infectivity and an important determinant of transmission is the inadequacy of water supplies and sanitation. The World Health Organization (WHO) recommends a limit equal to or lower than one parasitic helminth egg per liter, to reuse reclaimed water for unrestricted irrigation...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28368580/use-of-soft-electrodes-in-capacitive-deionization-of-solutions
#16
Silvia Ahualli, Guillermo R Iglesias, María M Fernández, María L Jiménez, Ángel V Delgado
All efforts to obtain, reuse or purify water are extremely significant for society. Recently, researchers have begun to delve in an idea born decades ago: the desalination of water using highly porous electrodes. It is based on a fundamental aspect of electrical double layers, namely, their huge capacitance. The ions of a solution can be partially removed under the application of an electric field when the solution fills the space between porous electrodes, either bare (CDI, or capacitive deionization), coated with ionic exchange membranes (MCDI) or chemically treated (inverted-CDI or i-CDI)...
April 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28365352/wastewater-recycling-technology-for-fermentation-in-polyunsaturated-fatty-acid-production
#17
Xiaojin Song, Zengxin Ma, Yanzhen Tan, Huidan Zhang, Qiu Cui
To reduce fermentation-associated wastewater discharge and the cost of wastewater treatment, which further reduces the total cost of DHA and ARA production, this study first analyzed the composition of wastewater from Aurantiochytrium (DHA) and Mortierella alpina (ARA) fermentation, after which wastewater recycling technology for these fermentation processes was developed. No negative effects of DHA and ARA production were observed when the two fermentation wastewater methods were cross-recycled. DHA and ARA yields were significantly inhibited when the wastewater from the fermentation process was directly reused...
March 9, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28363099/effect-of-aquifer-storage-and-recovery-asr-on-recovered-stormwater-quality-variability
#18
D W Page, L Peeters, J Vanderzalm, K Barry, D Gonzalez
Aquifer Storage and Recovery (ASR) is increasingly being considered as a means of reusing urban stormwater to supplement available urban water resources. Storage of stormwater in an aquifer has been shown to affect water quality but it has also been claimed that storage will also decrease the stormwater quality variability making for improved predictability and management. This study is the first to document the changes in stormwater quality variability as a result of subsurface storage at four full scale ASR sites using advanced statistical techniques...
March 25, 2017: Water Research
https://www.readbyqxmd.com/read/28361394/financial-feasibility-of-end-user-designed-rainwater-harvesting-and-greywater-reuse-systems-for-high-water-use-households
#19
Edgar Ricardo Oviedo-Ocaña, Isabel Dominguez, Sarah Ward, Miryam Lizeth Rivera-Sanchez, Julian Mauricio Zaraza-Peña
Water availability pressures, competing end-uses and sewers at capacity are all drivers for change in urban water management. Rainwater harvesting (RWH) and greywater reuse (GWR) systems constitute alternatives to reduce drinking water usage and in the case of RWH, reduce roof runoff entering sewers. Despite the increasing popularity of installations in commercial buildings, RWH and GWR technologies at a household scale have proved less popular, across a range of global contexts. For systems designed from the top-down, this is often due to the lack of a favourable cost-benefit (where subsidies are unavailable), though few studies have focused on performing full capital and operational financial assessments, particularly in high water consumption households...
March 30, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28358492/%C3%AE-feooh-nanorods-carbon-foam-based-hierarchically-porous-monolith-for-highly-effective-arsenic-removal
#20
Xiao Ge, Yue Ma, Xiangyang Song, Guozhong Wang, Haimin Zhang, Yunxia Zhang, Huijun Zhao
Arsenic pollution in waters has become a worldwide issue, constituting a severe hazard to whole ecosystems and public health worldwide. Accordingly, it is highly desirable to design high-performance adsorbents for arsenic decontamination. Herein, a feasible strategy is developed for in situ growth of β-FeOOH nanorods (NRs) on a three-dimensional (3D) carbon foam (CF) skeleton via a simple calcination process and subsequent hydrothermal treatment. The as-fabricated 3D β-FeOOH NRs/CF monolith can be innovatively utilized for arsenic remediation from contaminated aqueous systems, accompanied by remarkably high uptake capacity of 103...
April 6, 2017: ACS Applied Materials & Interfaces
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